a board, usually of stainless steel, fitted under part of the wire in a Fourdrinier machine for supporting the pulp stack before it is sufficiently formed to support itself on the wire.
1810, in paper-making, from German deckel "lid, little cover," diminutive of decke "cover" (see deck (n.)).
deckle in Technology
/dek'l/ (From "dec-" and "nibble"; the original spelling seems to have been "decle") Two nickles; 10 bits. Reported among developers for Mattel's GI 1600 (the Intellivision games processor), a chip with 16-bit wide RAM but 10-bit wide ROM. [Jargon File] (1994-11-23)